烧结温度对超低损耗锰锌铁氧体性能的影响  

Influences of sintering temperature on the properties of ultra-low power loss MnZn ferrites

作　　者：王微达 李永劬 李明治 WANG Wei-da;LI Yong-qu;LI Ming-zhi(Haining Lianfeng Magnet Industry Co, Ltd, Haining 314412, China)

机构地区：[1]海宁联丰磁业股份有限公司,浙江海宁314412

出　　处：《磁性材料及器件》2016年第5期28-31,共4页Journal of Magnetic Materials and Devices

摘　　要：使用同一配方制备得到的锰锌铁氧体坯件分别在1360℃、1330℃、1300℃下采用平衡气氛法烧结,制备得到致密的锰锌铁氧体磁环。SEM结果表明,降低烧结温度有效地减小了晶粒尺寸,消除了晶粒内部气孔,改善了晶粒均匀程度,使晶界更为清晰。电磁性能测试表明,在三种温度烧结得到的锰锌铁氧体材料的起始磁导率μi没有显著差异;饱和磁感应强度Bs随烧结温度降低有小幅上升;总功率损耗随烧结温度的降低而下降;并且在1300℃烧结的铁氧体材料的功率损耗(100k Hz/200m T,100℃)很低,约为255k W/m^3。通过损耗分离证实,总功率损耗的改善主要是涡流损耗大幅降低所致。MnZn power ferrites with same composition and addition were prepared sintering at1360℃,1330℃and1300℃.The results of SEM show that reduction of sintering temperature decreases grain size effectively,and thepores in grain are eliminated.The results also show that the grain is more uniform and the grain boundary is clearer.Theresults of electromagnetic performance indicate that sintering temperature has insignificant effect on initial permeability,but magnetic flux density increases and power loss decreases significantly at100kHz/200mT and100℃while sinteringtemperature drops.The power loss is about255kW/m3,for sample sintered at1300℃.By the loss separation,improvement of total power loss is mainly a result of drop in the eddy current loss.

关 键 词：锰锌铁氧体 烧结温度 功率损耗 起始磁导率 饱和磁感应强度 

分 类 号：TM277.1[一般工业技术—材料科学与工程]